Fluid circulation system and method for operating same, computer-readable medium, and controller

A controller of a fluid circulation system, the fluid circulation system comprising:

• a scroll expander;
• and
• an external fluid circulation path, which comprises a high pressure fluid pipe for supplying fluid to the scroll expander and a low pressure fluid pipe for conveying fluid from the scroll expander,
• wherein the controller comprises a non-transitory computer-readable medium that stores a computer program that, when executed, implements the following steps of an operation method of the fluid circulation system;
• a step of establishing pressure difference:
• before supplying fluid to the scroll expander, making a fluid pressure in the high pressure fluid pipe higher than a fluid pressure in the low pressure fluid pipe by a predetermined pressure difference;
• and
• a step of starting the scroll expander:
• after the predetermined pressure difference is reached through the step of establishing the pressure difference, starting the scroll expander and supplying fluid to the scroll expander.

A fluid circulation system comprising:

• a scroll expander;
• and
• an external fluid circulation path, which comprises a high pressure fluid pipe for supplying fluid to the scroll expander and a low pressure fluid pipe for conveying fluid from the scroll expander,
• wherein the fluid circulation system is controlled by the controller such that:
• before supplying fluid to the scroll expander, a fluid pressure in the high pressure fluid pipe is higher than a fluid pressure in the low pressure fluid pipe by a predetermined pressure difference.